I have them on all my rackets to protect my costly Babolat natural gut strings, and they work great and you can take the racket out of the bag with great ease - even though you have stuffed your tennis bag with racquets, because of these slippery protective thin bags.

I carry 7-8 racquets in my Wilson Super Six bag - they scratch against each other and I use Babolat natural gut strings and want to protect these strings, the best way I can. These small protective cases protects my strings, so when I take one racquet out of my bag it won't accidentally scratch a nat gut string on one of my other racquets - you get the idea :lol: